Machine Design Set 14

Mechanical Engineering

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This set of Machine Design Multiple Choice Questions & Answers (MCQs) focuses on Machine Design Set 14

Q1 | In flange coupling the weakest element should be
  • Shaft
  • Flange
  • Key
  • Bolts
  • Bolt bush
Answer: Key
Q2 | The light gauge steel structural members are generally
  • fabricated fromthick sections
  • hot rolled
  • Increasing the diameter of threaded portion
  • cold formed
  • casted
Answer: cold formed
Q3 | In general, the bunkers are constructed
  • circular and polygonal in plan
  • square and rectangular in plan
  • Increasing the diameter of threaded portion
  • hexagonal in plan
  • elliptical in plan
Answer: square and rectangular in plan
Q4 | In case of a cotter joint the compressive load is transmitted from one rod to another rod
  • Directly
  • Via cotter
  • Via cotter pin
  • Via collar
  • None of the above
Answer: Via collar
Q5 | The shock absorbing capacity of a bolt is increased by
  • Proper tightening
  • Use of a spring washer
  • Making shank diameter equal to the core diameter
  • Preventingstress concentration any where in the bolt
  • None of the above
Answer: Making shank diameter equal to the core diameter
Q6 | When a nut is tightened by placing a washer under it, the bolt tends to fall in
  • compression
  • tension
  • shear
  • none of the above
  • Cast steel
Answer: tension
Q7 | 100 m of water column is equal to
  • 1 kN/m2
  • 1000 kN/m2
  • 10 kN/m2
  • 100 kN/m2
  • 0.1 kN/m2
Answer: 1000 kN/m2
Q8 | Jaw clutches are generally used for
  • high horse power low rpm applications
  • low horse power high rpm applications
  • high horse power high rpm applications
  • low horse power low rpm applications
  • Increasing the diameter of threaded portion
Answer: low horse power low rpm applications
Q9 | Which of the following fit can be used for interchangeable assembly
  • 10 kg
  • Tight
  • Sung
  • Medium force
  • Wringing
Answer: Sung
Q10 | Within elastic limits the greatest amount of strain energy per unit volume that a material can absorb is known as
  • Resilience
  • Shock proof energy
  • Proof resilience
  • Impact energy limit
  • Strain hardening
Answer: Proof resilience
Q11 | A double start screw has
  • Two threads per inch
  • Fine threads
  • Coarse threads
  • Two threads at some phase angle
  • None of the above
Answer: Two threads at some phase angle
Q12 | For butt welding of two plates each of which is 25 mm thick, the best process would be
  • Electron slag welding
  • Submerged are welding
  • MIG welding
  • Gas welding
  • TIG welding
Answer: Electron slag welding
Q13 | The stretching in a belt is controlled by
  • Increasing belt velocity
  • Reducing stress in the belt
  • Increasing belt thickness
  • Reducing belt length
  • Increasing centre distance
Answer: Reducing stress in the belt
Q14 | A positive infinitely variable (P.I.V.) system utilises
  • Variable pitch chain drive system
  • Hydraulic variable speed drive
  • Rolling contact variable speed
  • Vee belt variable speed system
  • None of the above
Answer: Variable pitch chain drive system
Q15 | Which oil has highest specific gravity?
  • Castor
  • Sperm
  • Cotton Seed
  • Petroleum
  • Turpentine
Answer: Castor
Q16 | Within the elastic range, the bulk modulus of elasticity is defined as the ratio of
  • hydrostatic stress to the volumetric strain
  • shearing stress to the shearing strain
  • longitudinal stress to the longitudinal strain
  • none of the above
  • Increasing the diameter of threaded portion
Answer: hydrostatic stress to the volumetric strain
Q17 | In case of aircraft body the type of welding generally used is
  • Gas welding
  • Arc welding
  • Spot welding
  • Seam welding
  • None of the above
Answer: None of the above
Q18 | A spring deflects 50 mm under a 250 kg load. If the load is applied gradually, the energy absorbed by the spring will be
  • 2500 kg-cm
  • 312.5 kg-cm
  • 1050 kg-cm
  • 625 kg-cm
  • 1250 kg-cm
Answer: 625 kg-cm
Q19 | In a shaft, the shear stress is not directly proportional to
  • radius of the shaft
  • length of the shaft
  • Increasing the diameter of threaded portion
  • modulus of rigidity
  • angle of twist.
Answer: length of the shaft
Q20 | In which component a ball or roller bearing cannot be used?
  • Water circulating pump
  • Wheel bearing in automobiles
  • Small end of connecting rod
  • Carankshaft main bearings
  • Big end of connecting rod
Answer: Big end of connecting rod
Q21 | Muntz metal contains
  • Copper-aluminium
  • Copper-tin
  • Copper-chromium
  • Copper-nickel
  • Copper-zinc
Answer: Copper-zinc
Q22 | The deep bins are the containers in which the plane of rupture intersects
  • the top surface of material stored
  • Increasing the diameter of threaded portion
  • the opposite surface (wall) near the bottom
  • the bottom survace of material stored
  • the opposite face (wall) near the top
Answer: the opposite face (wall) near the top
Q23 | For design purpose a spur gear tooth is considered
  • As a cantilever
  • As vital component in analysis
  • As a rough surfacerubbing with another rough surface
  • Proped beam
  • None of the above
Answer: As a cantilever
Q24 | A 20 HP 1500 r.p.m. induction motor will take current of nearly
  • 20-30 Amp
  • 5 Amp
  • 1 Amp
  • 10-15 Amp
  • 15-20 Amp
Answer: 20-30 Amp
Q25 | Gears for wrist watches are generally manufactured by
  • Pitcl, angle
  • Helix angle
  • Axial pitch angle
  • Lead angle
  • Pressure angle
Answer: Helix angle
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